PDF malware analysis — malicious · a4e51ae0b0ce37bc

MALICIOUS

PDF

36.7 KB Created: 2021-07-08 18:32:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: c0afc5d37ef3322d7d349a72d681221f SHA-1: 78a38dffc4784ad2abc3a98b08ecc26f8975b271 SHA-256: a4e51ae0b0ce37bc29219e99885aac6aff62c1252f5dd45d60fb54742b14d2af

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary lure pointing to a 'game hack' redirector. The ML classifier strongly indicated maliciousness, and the presence of game-related lures suggests a social engineering tactic to drive traffic to potentially malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or scam attempt, likely initiated via spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE

PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
External URI info PDF_URI

PDF contains an external URL action
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://netcdn.tw/app/406889139/coin-master-free-spin-reward-links-game-hack PDF link annotation
- http://www.glabintl.com/uploaded_files/userfiles/files/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/noob-vs-pro-vs-hacker-roblox-bee-swarm-simulator_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/free-roblox-girl-hair-codes_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/how-to-fly-hack-in-tower-of-hell-roblox_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/earn-robux-today_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/bomb-hair-salon-roblox-no-hacks_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/www-free-robux_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/free-robux-cards_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/roblox-skins-editor-free_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/how-to-hack-in-onemillion-robux_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/codes-for-roblox-hack_GM431946152.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
- http://www.glabintl.com/uploaded_files/userfiles/files/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off000037a7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x37A7	23016 bytes
SHA-256: `1c15650c8af760b9c0f3375c55c7e5fb745001e8d2d541cda23e43d3004d8406`
`font_01_sfnt_off00006b81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6B81	18680 bytes
SHA-256: `1f410b421e14c3c9fbf7e9bbfeefe584f4a56fc2fc275a58efc280a6e8be8f92`

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